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  2. Color psychology - Wikipedia

    en.wikipedia.org/wiki/Color_psychology

    Color psychology is the study of hues as a determinant of human behavior. Color influences perceptions that are not obvious, such as the taste of food. Colors have qualities that can cause certain emotions in people. [1] How color influences individuals may differ depending on age, gender, and culture. [2]

  3. Color - Wikipedia

    en.wikipedia.org/wiki/Color

    Color. Colored pencils. Color ( American English) or colour ( Commonwealth English) is the visual perception based on the electromagnetic spectrum. Though color is not an inherent property of matter, color perception is related to an object's light absorption, reflection, emission spectra and interference.

  4. Heliotrope (color) - Wikipedia

    en.wikipedia.org/wiki/Heliotrope_(color)

    CIELCh uv ( L, C, h) (66, 102, 295°) Source. Maerz and Paul [1] ISCC–NBS descriptor. Vivid purple. B: Normalized to [0–255] (byte) Heliotrope is a pink - purple tint that is a representation of the colour of the heliotrope flower . The first recorded use of heliotrope as a color name in English was in 1882.

  5. Gram stain - Wikipedia

    en.wikipedia.org/wiki/Gram_stain

    Gram stain. Micrograph of a gram-positive coccus and a gram-negative rod. Gram stain ( Gram staining or Gram's method ), is a method of staining used to classify bacterial species into two large groups: gram-positive bacteria and gram-negative bacteria. It may also be used to diagnose a fungal infection. [1]

  6. Puce - Wikipedia

    en.wikipedia.org/wiki/Puce

    Puce is a brownish purple color. The term comes from the French couleur puce, literally meaning "flea color".. Puce became popular in the late 18th century in France. It appeared in clothing at the court of Louis XVI, and was said to be a favorite color of Marie Antoinette, though there are no portraits of her wearing it.

  7. Ultraviolet - Wikipedia

    en.wikipedia.org/wiki/Ultraviolet

    Ultraviolet ( UV) light is electromagnetic radiation of wavelengths of 10–400 nanometers, shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight, and constitutes about 10% of the total electromagnetic radiation output from the Sun. It is also produced by electric arcs, Cherenkov radiation, and ...

  8. Mauveine - Wikipedia

    en.wikipedia.org/wiki/Mauveine

    Mauveine. Mauveine, also known as aniline purple and Perkin's mauve, was one of the first synthetic dyes. [1] [2] It was discovered serendipitously by William Henry Perkin in 1856 while he was attempting to synthesise the phytochemical quinine for the treatment of malaria. [3] It is also among the first chemical dyes to have been mass-produced.

  9. Colors of noise - Wikipedia

    en.wikipedia.org/wiki/Colors_of_noise

    Red (Brownian) Purple. Grey. v. t. e. In audio engineering, electronics, physics, and many other fields, the color of noise or noise spectrum refers to the power spectrum of a noise signal (a signal produced by a stochastic process ). Different colors of noise have significantly different properties. For example, as audio signals they will ...